100model
Well-Known Member
Hi everyone
I made a video of a friend of mine using his propane furnace to melt cast iron.
There are two methods he uses that are very [FONT=Times New Roman, serif]unique to backyard metal casters.[/FONT]
[FONT=Times New Roman, serif]1. He uses a simple heat exchanger to preheat his incoming combustion air with the exhaust gases. The reason why he added the heat exchanger is because his furance would not get hot enough to melt cast iron. At the 1.32 to 1.44 part of the video you will be able to see a close up of the heat exchanger. On the lefthand side is the incoming cold air from a vacuum cleaner, then it exits underneath and into the furnace. The exhaust gases exit at the lower righthand side. The small pipe rising vertically is the incoming propane gas. He says there are two more advanages using this system, because it gets up temperature quicker it uses less propane and the exhaust noise level is reduced. [/FONT]
[FONT=Times New Roman, serif]2. For a sand binder he uses a fast setting cement,(ciment fondu)[/FONT][FONT=Times New Roman, serif]it takes only 24 hrs and is ready to use. Only just enough water is used to make the mixture set ( about 4%) so no predrying is needed. Have a look at the video [/FONT][ame]http://youtu.be/Kzp3UxpZzkg[/ame]
I made a video of a friend of mine using his propane furnace to melt cast iron.
There are two methods he uses that are very [FONT=Times New Roman, serif]unique to backyard metal casters.[/FONT]
[FONT=Times New Roman, serif]1. He uses a simple heat exchanger to preheat his incoming combustion air with the exhaust gases. The reason why he added the heat exchanger is because his furance would not get hot enough to melt cast iron. At the 1.32 to 1.44 part of the video you will be able to see a close up of the heat exchanger. On the lefthand side is the incoming cold air from a vacuum cleaner, then it exits underneath and into the furnace. The exhaust gases exit at the lower righthand side. The small pipe rising vertically is the incoming propane gas. He says there are two more advanages using this system, because it gets up temperature quicker it uses less propane and the exhaust noise level is reduced. [/FONT]
[FONT=Times New Roman, serif]2. For a sand binder he uses a fast setting cement,(ciment fondu)[/FONT][FONT=Times New Roman, serif]it takes only 24 hrs and is ready to use. Only just enough water is used to make the mixture set ( about 4%) so no predrying is needed. Have a look at the video [/FONT][ame]http://youtu.be/Kzp3UxpZzkg[/ame]
